27. A load P is supported by two springs arranged in series. The
upper spring has 20 turns of 29mm diameter wire on a mean
diameter of 150mm. The lower spring consist of 15 turns of 10mm
diameter wire on a mean diameter of 130mm. Determine the
value of P that will cause a total deflection of 80mm. Assume G =
80GPa for both springs. (ANS. 223.30 N)
